MC34704AEP Freescale Semiconductor, MC34704AEP Datasheet - Page 42

• Manufacturer Part Number: MC34704AEP
• Description: IC POWER MANAGEMENT 56-QFN
• Manufacturer: Freescale Semiconductor

Specifications of MC34704AEP

• Applications: Processor
• Current - Supply: 86mA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 56-QFN
• Output Voltage: 5 V
• Input Voltage: 2.7 V to 5.5 V
• Switching Frequency: 750 KHz to 2 MHz
• Mounting Style: SMD/SMT
• Number Of Outputs: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The passive components associated to these frequencies are calculated with the following formulas.
42
34704
FUNCTIONAL DEVICE OPERATION
COMPONENT CALCULATION
F
PO
On the 34704 V
C1
C2
R2
R3
C3
=
=
=
=
=
=
F
⎛
⎝
⎛
⎝
⎛
⎝
⎛
⎝
------------------
V
Vin
BW
----------------------------- -
2π F
----------------------------- -
2π F
----------------------------- -
2π F
----------------------------- -
2π F
RAMP
min
(
(
(
(
F
1
Z2
1
Z1
1
P1
1
P2
P1
⎛
⎜
⎝
---------------- -
D′
R1
C1
C2
R2
RAMP
F
=
Z1
min
1
)
)
)
)
F
⎞
⎠
⎞
⎠
⎞
⎠
⎞
⎠
=
ESR
2
is half of 1.2 V since each operation mode spends only half the ramp.
⎞
⎟
⎠
⎛
⎝
0.9F
------------------------------ -
2π F
(
LC
PO
1
F
2P
R1
=
)
F
⎞
⎠
22
F
---------- -
SW
2
=
1.1F
LC
Analog Integrated Circuit Device Data
Freescale Semiconductor